Question

Va rog ...urgent ex 9
Dau coroana

Answer 1

$x + y + z = 15\frac{2}{3} \\ x + y + z = \frac{47}{3} \\ y = 2x \\ y = z - \frac{2}{3} \\ x = \frac{y}{2} = > x = (z - \frac{2}{3} ) \div 2 \\ (z - \frac{2}{3} ) \div 2 + (z - \frac{2}{3} ) + z= \frac{47}{3} \\ \frac{3z - 2}{3} \times \frac{1}{2} + z - \frac{2}{3} + z = \frac{47}{3} \\ \frac{3z - 2}{6} + 2z - \frac{2}{3} = \frac{47}{3} \\ 3z - 2 + 12z - 4 = \frac{47}{3} \times 6 \\ 15z - 6 = 94 \\ 15z = 94 + 6 \\ 15z = 100 \\ z = 100 \div 15 \\ z = \frac{20}{3} \\ y = \frac{20}{3} - \frac{2}{3} = \frac{18}{3} \\ \frac{18}{3} = 2x = > x = 3$